validate: add Hooks validation

Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com>

Author: Ma Shimiao

man/ocitools-validate.1.md

@@ -8,6 +8,7 @@ ocitools-validate - Validate a OCI bundle
 **ocitools validate**
 [**--help**]
 [**--path**[=*PATH*]
+[**--hooks-check**[=*true*|*false*]
 
 # DESCRIPTION
 
@@ -20,6 +21,9 @@ Validate an OCI bundle
 **--path="PATH"
    Path to bundle
 
+**--hooks-check**
+  Specify check hooks on host, default is false.
+
 # SEE ALSO
 **ocitools**(1)
 

validate.go

@@ -16,6 +16,7 @@ import (
 
 var bundleValidateFlags = []cli.Flag{
 	cli.StringFlag{Name: "path", Usage: "path to a bundle"},
+	cli.BoolFlag{Name: "hooks-check", Usage: "Specify check hooks on host, default is false"},
 }
 
 var (
@@ -72,18 +73,23 @@ var bundleValidateCommand = cli.Command{
 			logrus.Fatalf("Rootfs: %v is not a directory.", spec.Root.Path)
 		}
 
-		bundleValidate(spec, rootfsPath)
+		hooksCheck := context.Bool("hooks-check")
+		bundleValidate(spec, rootfsPath, hooksCheck)
 		logrus.Infof("Bundle validation succeeded.")
 	},
 }
 
-func bundleValidate(spec rspec.Spec, rootfs string) {
+func bundleValidate(spec rspec.Spec, rootfs string, hooksCheck bool) {
 	checkMandatoryField(spec)
 	checkSemVer(spec.Version)
 	checkPlatform(spec.Platform)
 	checkProcess(spec.Process, rootfs)
 	checkMounts(spec.Mounts, rootfs)
 	checkLinux(spec.Linux, rootfs)
+
+	if hooksCheck {
+		checkHooks(spec.Hooks)
+	}
 }
 
 func checkSemVer(version string) {
@@ -128,6 +134,26 @@ func checkPlatform(platform rspec.Platform) {
 	logrus.Fatalf("Operation system '%s' of the bundle is not supported yet.", platform.OS)
 }
 
+func checkHooks(hooks rspec.Hooks) {
+	for _, prestart := range hooks.Prestart {
+		if _, err := os.Stat(prestart.Path); err != nil {
+			logrus.Fatalf("Cannot find pre-start hook: %v", prestart.Path)
+		}
+	}
+
+	for _, poststart := range hooks.Poststart {
+		if _, err := os.Stat(poststart.Path); err != nil {
+			logrus.Fatalf("Cannot find post-start hook: %v", poststart.Path)
+		}
+	}
+
+	for _, poststop := range hooks.Poststop {
+		if _, err := os.Stat(poststop.Path); err != nil {
+			logrus.Fatalf("Cannot find post-stop hook: %v", poststop.Path)
+		}
+	}
+}
+
 func checkProcess(process rspec.Process, rootfs string) {
 	for index := 0; index < len(process.Capabilities); index++ {
 		capability := process.Capabilities[index]